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Common variable star 15 EP

HR 6709

RA 270.0653° · Dec 0.6295° · star

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Score breakdown

· 4 badges
15 pts · Common
Common 22 pts → Uncommon
  • Variable star +5
  • White A-type star +5
  • A named variable star +3
  • Barely variable (under 0.05 mag) +2
Total score 15

7 more points to reach Uncommon.

Badges

  • Variable star · +5
  • White A-type star · +5
  • Barely variable (under 0.05 mag) · +2
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads A3spe... — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.
  • It changes. This star does not hold still: its brightness rises and falls on a rhythm of hours, days or years, either pulsing in size or being eclipsed by a companion.

Sense of scale

  • In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.

Find it in the sky

  • How to spot it. At magnitude 6.4 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Ophiuchus.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • Best time of year. It stands highest in the middle of the night around June — that's when to go looking.

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Getting there

  • Aboard Voyager 1. ≈ 7.8 million years at Voyager 1's speed (17 km/s).

Properties

absmag
0.703
bv
0.16
constellation
Oph
dist ly
441.3478
luminosity
45.5827
mag
6.36
name
HR 6709
spect
A3spe...
var amplitude
0.03
var designation
V2126
var max
6.34
var min
6.37

About HR 6709

HR 6709 is a common variable star. It lies about 441.3 light-years from Earth, sits in the constellation Oph, shines at apparent magnitude 6.36 and has spectral type A3spe....

Its spectrum reads A3spe... — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.

How to see it

Look for HR 6709 in the constellation Oph. At apparent magnitude 6.36, it is an easy target for binoculars.

Like any astronomical target, HR 6709 is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.

Why HR 6709 is a common variable star

HR 6709 scores 15 points on Spacedle's rarity scale, which places it in the common tier. Another 7 points would lift it into a rarer tier.

That score comes from 4 science badges — Variable star, White A-type star, Barely variable (under 0.05 mag) and A named variable star — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.